Crankpin Grinding by Crankshaft Grinding Machine – RA Power Solutions
A diesel power plant based in northern India, having 10 nos. of 12.3 MW Wartsila diesel generating sets, reported a severe casualty involving one of their Wartsila generators. RA Power Solutions’ team of technicians rushed to the power plant with the measuring instruments and onsite crankshaft grinding equipment to assess the cause of the breakdown.
We inspected the crankshaft in detail with dimensional checks, hardness tests, and MPI for cracks and deflection. We found damage on one of the crankpin journals caused by a big-end bearing failure.
Inspection & Diagnosis:
- Taper and ovality in the crankpin is observed as 0.70 mm.
- Due to the failure of the bearing, deep line marks were visible.
- Hardness and MPI tests were done, and no cracks were observed.
RA Power Solutions’ Edge
RA Power Solutions used the latest design of onsite crankshaft grinding machine having almost no vibrations. The crankpin was undersized by 1.5 mm, maintaining the tolerance within 10 microns. Our technicians took only 18 hours to complete the Crankshaft repair from the time of the start of the preliminary inspection, grinding, and final inspection. The repair of the crankpin in such a short time was possible due to the latest technology onsite crankshaft grinding machine used and the experience of our technicians.
RA Power Solutions has four decades of experience in working on crankshafts of high-capacity main and auxiliary engines. Factory training prepares our technicians to repair crankshafts. They follow the manufacturer’s specifications and tolerances strictly.
For more information on Portable Crankshaft Grinding Machine, please email us at rajshahani@rapowersolutions.com, or info@rapowersolutions.com, or call us at +91 9582647131 or +91 9810012383.
FAQs:
It’s the process of machining and restoring worn or damaged crankpins on a crankshaft to OEM specifications.
You need grinding when a crankpin shows ovality or taper. It also becomes necessary if you notice scoring or surface damage from bearing failure.
Yes, with portable crankshaft grinding machines, repairs can be done at the site without dismantling the crankshaft.
Modern machines achieve tolerances within 10 microns, ensuring smooth operation.
In most cases, we complete inspection, grinding, and finishing within 18–24 hours.
